單片機播放音樂的譜子問題

ID:82702 · 發(fā)表于 2015-6-11 12:36

大家好！最近對51單片機播放音樂比較感興趣，但中間遇到一些問題特來請教！1.這一首生日歌的歌譜是用簡譜寫的，那么搜索什么可以找到其他的譜子；2.譜子中的1.2.3……是怎么區(qū)分高8位，還是低8位的？3.曲子的頻率的計算公式是如何？或者說怎么用這個代碼移植到其他曲子？#include <reg51.h>
sbit    speaker=P1^5;
unsigned char timer0h,timer0l,time;
      //生日歌
code unsigned char sszymmh[]={5,1,1, 5,1,1, 6,1,2, 5,1,2, 1,2,2, 7,1,4,
      5,1,1, 5,1,1, 6,1,2, 5,1,2, 2,2,2, 1,2,4,
      5,1,1, 5,1,1, 5,2,2, 3,2,2, 1,2,2, 7,1,2, 6,1,2,
      4,2,1, 4,2,1, 3,2,2, 1,2,2, 2,2,2, 1,2,4};
   // 音階頻率表高八位
code unsigned char FREQH[]={
                              0xF2,0xF3,0xF5,0xF5,0xF6,0xF7,0xF8,
                              0xF9,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC,0xFC, //1,2,3,4,5,6,7,8,i
                              0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,
                              0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,
                           } ;
      // 音階頻率表低八位
code unsigned char FREQL[]={
                              0x42,0xC1,0x17,0xB6,0xD0,0xD1,0xB6,
                              0x21,0xE1,0x8C,0xD8,0x68,0xE9,0x5B,0x8F, //1,2,3,4,5,6,7,8,i
                              0xEE,0x44, 0x6B,0xB4,0xF4,0x2D,
                              0x47,0x77,0xA2,0xB6,0xDA,0xFA,0x16,
                              };
void delay(unsigned char t)
{
unsigned char t1;
unsigned long t2;
for(t1=0;t1<t;t1++)
{
for(t2=0;t2<8000;t2++)
   {
      ;
      }
}
TR0=0;
}
void t0int() interrupt 1
{
TR0=0;
speaker=!speaker;
TH0=timer0h;
TL0=timer0l;
TR0=1;
}
void song()
{
TH0=timer0h;
TL0=timer0l;
TR0=1;
delay(time);
}

void main(void)
{
unsigned char k,i;
TMOD=1; //置CT0定時工作方式1
EA=1;
ET0=1;//IE=0x82 //CPU開中斷,CT0開中斷
while(1)
   {
   i=0;
   while(i<75){       //音樂數(shù)組長度，唱完從頭再來
   k=sszymmh[i]+7*sszymmh[i+1]-1;
   timer0h=FREQH[k];
   timer0l=FREQL[k];
   time=sszymmh[i+2];
   i=i+3;
   song();
      }
   }
  }